Etymology

vestibular

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Today it means: Of or pertaining to a vestibule in a building (or railway coach). Full definition →

Proto-Indo-European *h₂élisder.? ← English vestibule or vestibulum
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The story

  1. Englishvestibule or vestibulum
  2. Proto-Indo-European*h₂el-
  3. Proto-Indo-European*h₂élisder.?
  4. English todayvestibular

From vestibule or vestibulum + -ar.

Etymology from Wiktionary, CC BY-SA 4.0.